Journal bearing



Sept.. 30, 1930. P ERMERT 1,777,259

JOURNAL BEARING Filed Sept. 20. 1928 IN VEN TOR.

Patented Sept. 3G, 193) ATE PAUL Eni/instr, or ELBERFNLEGNRMANY,AssIeNoa To n-INerEDEn G. ivi. B. n., oi UnitnINeEN-oisannnnmn GERMANY,A roiNT-s'rock ooiyrrANY or GERMANY JOURNAL BEAR-me Application filedSeptember 20, 1928, Serial No.v 307,186, and in Germany December 22,1926.

VThis invention has reference to a novel construction of bearings orjournals for pivots, trunnions, shafts and the like which are exposed toalterations and changes 'of pressure which are rapidly occurring insuccession and mostly in opposite directions, such as for instance inthe case of the bearings for the crank pins and the cross head rods andstuds of steam engines, internal combustion engines, working machineryand the like, and it is intended among other important objects toprovide means of reducing the excessive wear occurring in connectionwith devices of this kind and to compensate the inequalities of pressureand of wear in the operation of these and similar devices, and infurther pursuance of this invention it provides means of adjusting thestrain and the wear on the operating parts and on the bearingscooperating therewith. ln the case of crank pins and the like ashereinbefore referred to there is the serious diiiiculty that thebearings and journals, even if made of a superior grade oi" materialwill wear out after a very short time only, and the empty7 space therebyproduced between the pin, pivot or the like and the bearing becomes thecause of very heavy blows and slapping particularly upon the reversal ofthe direc` tion of pressure of the pin or the like, which results in avery rapid destruction of the bearings. In order to obviate thesedifficulties it has been suggested to considerably reduce the specificpressure on the bearing or journal by resorting to excessivedimensioning of the pins and the like and respectively of the bearingsand journals as a means of keeping` the wear of such bearings and thelike within admissible limits.

Now my invention has reference to a novel mode of construction ofbearings and joure nals by means of which these diliculties are overcomesubstantially by the employment of spring-actuating intermediate membersdisposed between the bearings or journals and the supporting body partof the device, the cross head, head of a pitman-rod and the like, andwhich are so arranged and coustructed as to become adapted Vtoautomatically iorce the bea-rings against the pins,

studs, shafts or the` like or inversely. It is a further object of thisinvention to provide means to reduce to a yminimum the space throughwhich the bearings will move against the springacting resistance withrel vimportance that the driven parts, pistons,

steering and controlling slides, tools and ythe llike will strictlyadhere to the `path prescribed for them.

' The invention will be more particularly described by reference to theaccompanying drawing showing an embodiment of the principles of theinvention by way of exempliiica- Vtion as applied to a crank pin in Fig.l in sectional view at right angle to the pin; Fig@ is a section on theline A B C of Fig. l; Fig. 8 is a face view of one ofthe bearingbrasses; and Fig. i is a view` of a ring spring group.

ln the head l the sectional bearings 2 and 3 are arranged which, asappears from the drawings surroundjthe crank pin il. Preferably a slot 5is provided between the two j sections of the bearing in view ot" thewear on the bearing` sections to be anticipated. Upon one side ot thehead l the bearing section mounted upon groups or sets of ring springs Gof well-known construction ofV which a plurality may be adj acentlydisposed and which surround the projections or studs 2 of the bearingsection with a certain amount oi play and which rest against and aresupported by the substantially smooth transverse wall l oi the bearinghead l. ln the present instance each group or set oi ring springs isshown as comprising three rings having inclinedor beveled engagingsurfaces, to wit, a central tension ring 6a and two oppositely disposedcompression rings (3b. The bearing section lis provided with a bearingand supporting surface 3 at an inclination .to the axis of the crank pinhead land against which av wedge 7 is adapted to ISB bear thewedge-angle of which of such size that its rear surface is at rightangle to the axis of the crank-rod head l. Upon its front ends the wedge7 is clasped by the projections 0r lugs 8 of a slide 9 which bearsagainst the surface 1" of the crank-rod head l which is situated atright angle to the axis thereof and along which the slide 9 may bedisplaced in the well-known manner by means of the screw 1U. The wedge 7is supported by a plurality kof adjacently disposed groups of ringsprings (i which seat in grooves 9d in and bear against the slide 9 fromwhich the corresponding studs or projections 9 project with play intothese annular springs. By the rotation of the screw l() the slide 9 withthe "Wed e 7 and the annular springs 6 inserted tierebetween may bedisplaced by which means the springs 6 may be tensioned or relieved, sothat by this means the space maybe exactly regulated through which thepin 4 is adapted to move with relation tothe crank-rod head at eachchange of stroke. By a correspondingly strong tensioning of the springs6 by the action of the wedge 7 this space may be reduced to the desiredminimum value; In the case of crank movements of power engines thisspace need not be any larger than the admissible distance of the bearingsections, when Worn out, from the pin or stud of the ordinary crank-pinbearing. Instead of the wedge 7 any other cor respondingly shapedadjusting and controlling means may be employed for the purpose ofEtensioning the springs.

The ring springs employed may be of types in common use and asexemplified, for instance, by Wikander Patent 1,598,228, of

Y Augustl, 1928, or Bell and VVikander Patent'1,689,662, of October 30,1928, or of any of the other types of ringsprings in general use.

1. In a journal bearing, a bearing head,

`ajorlrnal arranged therein, a two-part, verticallydivided sectionalbearing in the bearing head and enclosing the journal, ring springcushioning devices between one of the bearing members and a side of thehead, a

`wedge engaging the other bearing member,

an adjusting slide for the wedge arranged between the Wedge and theopposite side wall of the head, and ring spring cushioning devicesbetween opposed suraces of the wedge and slide.

2. In a, device of the kind described, ahollow journal-supporting body,a journal housed in said body, sectional bearings surrounding saidjournal, ring spring support- Ting and cushioning devices between one ofsaid bearing-sections and a wall of said body, wedge-shaped adjustingmember adjustably engaging the outside of the opposite bearing section.`a slide intermediate the Wedgevshapedadjust-ing means, a. wall of thesup- 3. In a device of the kind described in combination, ahollowjournal-supporting body, a ournal housed in said body, bearingssurroundinfr said element, projections4 on said bearings,adjusting-means for the bearings, and ringspringsloosely surroundingsaid projections and retaining the bearing and adjusting meansresiliently in their proper positions.

In testimony whereof IailiX my signature.

PAUL ERMERT.

